US4637808A - Bicycle rear derailleur - Google Patents
Bicycle rear derailleur Download PDFInfo
- Publication number
- US4637808A US4637808A US06/701,874 US70187485A US4637808A US 4637808 A US4637808 A US 4637808A US 70187485 A US70187485 A US 70187485A US 4637808 A US4637808 A US 4637808A
- Authority
- US
- United States
- Prior art keywords
- tension pulley
- bicycle
- support arm
- drive chain
- pulley
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/16—Tensioning or adjusting equipment for chains, belts or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
- B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
- B62M9/121—Rear derailleurs
- B62M9/126—Chain guides; Mounting thereof
Definitions
- This invention relates to a bicycle rear derailleur, and more particularly to improvements in the rear derailleur for increasing its gear capacity (ability of a rear derailleur to compensate a sagging in an endless drive chain to keep it in tension).
- a multi-speed type bicycle is equipped with a multiple freewheel, which usually has three to eight different sized sprockets, and a rear derailleur for selectively shifting the drive chain from one sprocket to another sprocket of the multiple freewheel in order to effect a desired speed change.
- some of the multi-speed type bicycle is equipped with a multiple chainwheel (crank gear) and a front derailleur in addition to the multiple freewheel and the rear derailleur.
- the multiple chainwheel usually has two to three different sized sprockets, and the front derailleur is used for selectively shifting the drive chain from one sprocket to another sprocket of the chainwheel in order to effect a desired speed change.
- the number of available speed change gear positions is given by the number of the freewheel sprockets multiplied by the number of the chainwheel sprockets. For instance, in such a particular bicycle that is equipped with a multiple freewheel having six different sized sprockets and a multiple chainwheel having two different sized sprockets, the speed change of the bicycle is available at twelve (6 ⁇ 2) stages.
- a length of the endless chain for driving a bicycle is constant in whatever speed gear position it may be, while a length of a running course of the chain varies in accordance with a selected speed gear position.
- the length of the running course of the chain is reduced, resulting in that the chain has a certain excess in its length, producing a certain number of excess link plates of the chain.
- the chain loses its tension to produce an undesirable sagging, which will cause disengagement of the chain from the sprockets.
- the rear derailleur is provided with a tension mechanism so arranged as to compensate the sagging in the chain and always arranged as to compensate keep the chain in proper tension.
- the maximum sagging in the chain is produced when the chain is in engagement with the smallest freewheel sprocket and the smallest chainwheel sprocket, where the excess chain link plates, which causes the sagging and therefore should be absorbed for giving a tension, is greatest in number.
- a degree of the gear capacity is defined as the maximum number of the excess chain link plates which the rear derailleur can compensate to keep the chain in tension, and such number corresponds to a difference between the number of the teeth of the largest sprocket and that of the teeth of the smallest sprocket.
- the maximum number of the excess chain link plates corresponds to the sum of a difference between the numbers of the teeth of the largest and the smallest sprockets of the multiple freewheel and that between the numbers of the teeth of the largest and the smallest sprockets of the multiple chainwheel.
- a gear capacity required in the rear derailleur to be used with this particular multi-speed bicycle is 45T as a result of the following calculation:
- T is usually added to indicate that the value is derived from the number of the teeth corresponding to the number of excess chain link plates to be absorbed to keep the chain in proper tension.
- the rear derailleur having a large gear capacity is advantageous when utilized for a so-called mountain bike (a bicycle specially designed for off-road cycling--See FIG. 1 of the accompanying drawing).
- mountain bike a bicycle specially designed for off-road cycling--See FIG. 1 of the accompanying drawing.
- a diameter of the largest sprocket of the multiple freewheel must be large enough while a diameter of the smallest sprocket of the chainwheel must be small enough, so that a cyclist can make an easy ascent of a steep slope of a hillside or the like steadily and slowly.
- a diameter of the smallest sprocket of the freewheel must be small enough while a diameter of the largest sprocket of the chainwheel must be large enough, so that the cyclist can enjoy cycling on a plain or downward road or field at a high speed.
- the rear derailleur for use with a mountain bike should have a large gear capacity.
- the large gear capacity can be easily obtained by simply extending a length of a tension pulley support arm so as to increase a distance between a guide pulley and a tension pulley of the rear derailleur.
- this simple and easy way has never been employed in the manufacture of the mountain bikes because an increase in the length of the tension pulley support arm causes increase in danger of collision of the tension pulley against rocks or other obstacles on the off-road ground.
- the downwardly extended tension pulley support arm gives an unattractive appearance to a bicycle.
- Another object of the invention is to provide an improved rear derailleur which is particularly advantageous when utilized with a mountain bike.
- a further object of the invention is to provide an improved mechanism for a large gear capacity which is applicable to various types of existing rear derailleurs.
- the bicycle rear derailleur comprises a tensioner frame for rotatably supporting a guide pulley and a tension pulley, a shifter for shifting the tensioner frame in the directions substantially parallel with respect to an axis of a rear wheel hub, the tensioner frame including a tension pulley support arm which is resiliently urged to pivotally move rearwardly of the bicycle in order to give an adjusted tension to an endless drive chain in cooperation with the tension pulley rotatably supported at a free end of the tension pulley support arm, and a compensating mechanism for compensating a sagging in the endless drive chain which is arranged so as to stretch out the endless drive chain rearwardly of the bicycle so that a distance between a geometrical vertical line passing through a center of the tension pulley and a vertical tangential line at a rearmost point of a rearwardly stretched portion of the endless drive chain is larger than a radius of a guide pulley when the tension pulley support arm takes its rearmost position
- the aforesaid distance is enlarged by provision of an auxiliary tension pulley.
- the distance in question is enlarged by an enlarged tension pulley whose diameter is larger than that of the guide pulley.
- FIG. 1 is a schematic illustration showing a typical example of a mountain bike equipped with a rear derailleur according to the present invention
- FIG. 2 is a front elevation showing one embodiment of the rear derailleur of the invention, in which the rear derailleur is engaged with a bicycle drive chain on the smallest sprocket of the multiple freewheel;
- FIG. 3 is a right side elevation taken in the direction of an arrow III of FIG. 2;
- FIG. 4 is an enlarged bottom plan view of a parallelogrammic shifter, taken along the lines IV--IV of FIG. 2;
- FIG. 5 is a similar view to FIG. 2, but the rear derailleur is illustrated as being in engagement with the drive chain on the largest sprocket of the multiple freewheel;
- FIG. 6 is a front elevation showing a modification of the invention.
- FIG. 7 is a front elevation showing another embodiment of the invention.
- FIG. 1 of the accompanying drawings there is illustrated a typical example of a mountain bike equipped with a rear derailleur 10 according to the invention.
- the mountain bike is further equipped with a known multiple freewheel FW having a plurality of different sized sprockets FWS, a known front derailleur FD, a known multiple chainwheel CW having a plurality of different sized sprockets CWS, and a known endless drive chain CH which is engaged with a selected one of the freewheel sprockets FWS and also with a selected one of the chainwheel sprockets CWS, conventionally.
- the derailleur 10 of the invention is particularly advantageous when utilized for such mountain bike.
- FIGS. 2 to 5 illustrate embodiment of the invention, wherein the rear derailleur 10 of the invention is mounted to a known mounting bracket BR which is secured to a rear wheel hub spindle HS of a bicycle, conventionally.
- the derailleur 10 comprises a known deformable parallelogrammic shifter 11 which includes a stationary element 12 to be secured to the mountain bracket BR by means of a bolt BT, a pair of connecting elements 13 pivotally supported at their one side ends by the stationary element 12 so as to extend therefrom in parallel, and a movable element 14 pivotally supported by the other side ends of the pair of connecting element 13.
- the pair of connecting elements 13 are forcibly spaced apart by a certain distance by means of springs (not shown), and this distance is resiliently variable in accordance with tension imparted by a known control cable CC which consists of an outer cable OC and an inner cable IC, so that a mounting arm 15, which is rigidly connected to or integral with the movable element 14, can be shifted in the directions substantially parallel with respect to the axis of the rear wheel hub spindle HS.
- a known control cable CC which consists of an outer cable OC and an inner cable IC
- a tensioner frame for rotatably supporting a guide pulley as well as a tension pulley is carried by the movable element 14 of the shifter 11 so as to be shifted therewith in the directions substantially parallel with respect to the axis of the rear wheel hub spindle HS.
- the tensioner frame is resiliently urged to pivotally move in one direction in a vertical plane parallel to faces of the freewheel sprockets in order to give an adjusted tension to the endless drive chain.
- the basic construction as well as function of the tensioner frame per se are also well known in the art, and several types such as a so-called three-point balancing type (disclosed for example in U.S. Pat. No. 3,181,383), a so-called see-saw type (disclosed for example in U.S. Pat. No. 3,364,762), and a so-called pendulum type (disclosed for example in U.S. Pat. No. 3,677,103) have been proposed and actually utilized, every one of which is applicable to the rear derailleur of the present invention.
- a so-called three-point balancing type (disclosed for example in U.S. Pat. No. 3,181,383)
- a so-called see-saw type disclosed for example in U.S. Pat. No. 3,364,762)
- a so-called pendulum type (disclosed for example in U.S. Pat. No. 3,677,103) have been proposed and actually utilized, every one of which is applicable
- the tensioner frame includes a guide pulley support arm 16 which rotatably supports a known guide pulley 17 at its one end and is pivotally supported at its other end by the mounting arm 15 so as to move about a pin 18.
- the arm 16 is always urged clockwise in FIGS. 2 and 5 by a coil spring 19 housed in a spring case 20 secured to the mounting arm 15 extending from the movable element 14, conventionally.
- the tensioner frame further includes a tension pulley support arm 21 which rotatably supports a tension pulley 22 at its one end and is pivotally supported at its other end by the guide pulley support arm 16 so as to move about a pin 23.
- the arm 21 is also always urged clockwise by a coil spring (not shown). Such arrangement of the arms 16, 21 is also known in the art.
- the auxiliary tension pulley 24 is rotatably supported at a free end of a branch arm 25 extending substantially rearwardly from the tension pulley support arm 21.
- a length of the branch arm 25 should be so predetermined that a certain distance D, which is at least larger than a radius R of the guide pulley 17, is provided between a geometrical vertical line L1 passing through a center O of the tension pulley 22 and a vertical tangential line L2 at a rearmost point P of a rearwardly stretched portion of the drive chain CH when the tension pulley support arm takes its rearmost position.
- the aforesaid distance D was substantially equal to a radius of a guide pulley.
- the branch arm 25 may be rigidly connected at its one end to the tension pulley support arm 21 by welding for example, or may be formed integral with the arm 21. Or otherwise, the branch arm 25 may be detachable to the arm 21 by means of clamp screws (not shown) for example.
- the branch arm 25 may extend from any appropriate portion of the arm 21. In the illustrated embodiment, the branch arm 25 extends from a portion between the center of the guide pulley 17 and that of the tension pulley 22.
- branch arm 25 may be pivotally supported at its one end by a pin 26 on which the tension pulley 22 is rotatably supported.
- the auxiliary tension pulley 25 must be urged clockwise by means of a coil spring (not shown) provided at the pin 26 in the known manner.
- a second auxiliary tension pulley (not shown) may be provided in addition to the above described auxiliary tension pulley 24, and such second auxiliary tension pulley may be rotatably supported by a further branch arm (not shown) extended from the tension pulley support arm 21 or alternatively from the described branch arm 25 in the substantially same manner as described in the foregoing.
- a sagging in the endless drive chain CH is basically compensated by positional adjustment of the tension pulley 24.
- the maximum sagging in the chain is produced when the chain CH is engaged with the smallest freewheel sprocket and the smallest chainwheel sprocket, where the tension pulley 24 takes its rearmost position as illustrated in FIG. 2.
- the chain CH is in engagement with all of the tension pulley 22, the auxiliary tension pulley 24 and the guide pulley 17, so that the chain CH takes its running course indicated by a one-dot chain line CH1.
- the auxiliary tension pulley 24 does not exist, the chain CH will take its running course indicated by a two-dot chain line CH2 in FIG. 2.
- the provision of the auxiliary tension pulley 24 according to the invention contributes to extension of the length of the running course of the chain CH and therefore to increase of a gear capacity of the rear derailleur. It has been proved that a gear capacity of 45T or more can be easily provided according to the invention.
- FIG. 6 illustrates a modification of the tensioner frame of the rear derailleur of the invention, wherein the guide pulley 17 is rotatably supported by a pin 27 supported by a mounting arm which does not appear in FIG. 6 but is rigidly secured to the movable element 14 of the shifter 11 in the substantially same manner as described and illustrated with respect to the mounting arm 15 of the embodiment of FIGS. 2 to 5.
- the tension pulley support arm 21 is pivotally supported at its one end by the mounting arm so as to move about the pin 27.
- the tension pulley 22 is rotatably supported at a free end of the tension pulley support arm 21, while the auxiliary tension pulley 24 is rotatably supported by the branch arm 25 extended from the arm 21 in the substantially same manner as described in the foregoing.
- the operation of the derailleur of FIG. 6 is substantially the same as that of the derailleur of FIGS. 2 to 5.
- FIG. 7 illustrates another embodiment of the invention, wherein the afore-described tension pulley 22 and auxiliary tension pulley 24 are merged into a single, large diameter tension pulley 30 which is rotatably supported at a free end of a support arm 31.
- the arm 31 is pivotally supported at its other end by the guide pulley support arm 16 so as to move about the pin 23 and is always urged clockwise by a coil spring (not shown), in the substantially same manner as described and illustrated in the foregoing with respect to the embodiment of FIGS. 2 to 5.
- the distance D between the geometrical vertical line L1 passing through the center O of the tension pulley 30 and the vertical tangential line L2 at the rearmost point P of the rearwardly stretched portion of the drive chain CH is enlarged to provide an increased gear capacity of the rear derailleur.
- the operation of the rear derailleur of FIG. 7 is also substantially the same as that of the rear derailleur of FIGS. 2 to 6 as described and illustrated in the foregoing.
- the parallelogrammic shifter may be replaced by any other type shifter, e.g. such a specific shifter as disclosed in U.S. Pat. No. 4,469,479 to Ozaki.
- the tensioner frame for rotatably supporting the tension pulley and the guide pulley may be varied in many ways, because the basic idea of the invention is readily applicable to every rear derailleur that has a tension pulley and a support arm therefor.
Abstract
Description
(34-13)+(52-28)=45T
Claims (4)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59-28161 | 1984-02-16 | ||
JP2816184A JPS60174383A (en) | 1984-02-16 | 1984-02-16 | Rear derailer for bicycle |
JP59-27896[U] | 1984-02-27 | ||
JP2789684U JPS60138891U (en) | 1984-02-27 | 1984-02-27 | Bicycle rear derailleur |
Publications (1)
Publication Number | Publication Date |
---|---|
US4637808A true US4637808A (en) | 1987-01-20 |
Family
ID=26365898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/701,874 Expired - Fee Related US4637808A (en) | 1984-02-16 | 1985-02-15 | Bicycle rear derailleur |
Country Status (2)
Country | Link |
---|---|
US (1) | US4637808A (en) |
CA (1) | CA1236995A (en) |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4838837A (en) * | 1987-07-02 | 1989-06-13 | Campagnolo S.P.A. | Rear derailleur for bicycle gears |
US4842568A (en) * | 1987-07-24 | 1989-06-27 | Marelmo S.N.C. | Rear derailleur for bicycle gears |
US5013285A (en) * | 1988-10-27 | 1991-05-07 | Carlyle James P | Chain control apparatus |
US5397273A (en) * | 1993-02-03 | 1995-03-14 | Shimano Inc. | Rear derailleur for a bicycle |
US5421786A (en) * | 1993-02-03 | 1995-06-06 | Shimano Inc. | Rear derailleur bracket |
US5466194A (en) * | 1994-06-29 | 1995-11-14 | Bebop Incorporated | Jockey wheel assembly |
FR2750668A1 (en) * | 1996-07-03 | 1998-01-09 | Savard Franck | DEVICE FOR TENSIONING AND GUIDING A CHAIN FOR CHANGING BICYCLE SPEEDS |
FR2759968A1 (en) * | 1997-02-26 | 1998-08-28 | Franck Savard | Cycle rear derailleur gear |
US6165089A (en) * | 1998-04-15 | 2000-12-26 | Mcgreal; Timothy R. | Transmission apparatus and method |
US20040106482A1 (en) * | 2002-02-12 | 2004-06-03 | Masashi Nagano | Rear derailleur |
US20040110588A1 (en) * | 2002-07-31 | 2004-06-10 | Shimano, Inc. | Bicycle derailleur with a chain guide disposed at an upper portion of a link mechanism |
US6793598B1 (en) | 1998-08-26 | 2004-09-21 | Shimano Inc. | Rear derailleur device for a bicycle |
US20050192141A1 (en) * | 2004-02-26 | 2005-09-01 | Shimano Inc. | Bicycle derailleur |
US20050218623A1 (en) * | 2004-02-26 | 2005-10-06 | Shimano Inc. | Bicycle derailleur |
WO2007057198A1 (en) * | 2005-11-18 | 2007-05-24 | Angelo Pionna | Rocker for the rear derailleur of a bicycle |
US20070202978A1 (en) * | 2006-02-28 | 2007-08-30 | Shimano, Inc. | Low profile rear derailleur |
US20070202977A1 (en) * | 2006-02-28 | 2007-08-30 | Shimano Inc. | Low profile rear derailleur |
US20070207886A1 (en) * | 2006-02-28 | 2007-09-06 | Shimano, Inc. | Low profile rear derailleur with cable guide |
US20080064545A1 (en) * | 2006-09-11 | 2008-03-13 | Shimano Inc. | Bicycle rear derailleur |
US20080081716A1 (en) * | 2006-09-25 | 2008-04-03 | Shimano Inc. | Bicycle rear derailleur |
US20080096706A1 (en) * | 2006-10-24 | 2008-04-24 | Shimano, Inc. | Low profile rear derailleur with a chain receiving space |
US20080125259A1 (en) * | 2006-09-25 | 2008-05-29 | Shimano Inc. | Bicycle rear derailleur |
WO2011160307A1 (en) * | 2010-06-25 | 2011-12-29 | Chu Hsin-Kuang | Additional adjustable fully-automatic transmission for bicycle |
EP1752372B2 (en) † | 2005-07-19 | 2013-02-13 | Shimano Inc. | Bicycle rear derailleur |
US20150031483A1 (en) * | 2013-07-26 | 2015-01-29 | Shimano Inc. | Bicycle derailleur |
US9033833B2 (en) | 2011-01-28 | 2015-05-19 | Paha Designs, Llc | Gear transmission and derailleur system |
US9327792B2 (en) | 2011-01-28 | 2016-05-03 | Paha Designs, Llc | Gear transmission and derailleur system |
US9896147B2 (en) * | 2016-02-03 | 2018-02-20 | Quan Pham | Three wheeled velocipede |
RU2654444C1 (en) * | 2017-06-15 | 2018-05-17 | Евгений Павлович Бердюгин | Bicycle transmission |
US10207772B2 (en) | 2011-01-28 | 2019-02-19 | Paha Designs, Llc | Gear transmission and derailleur system |
US20210070396A1 (en) * | 2018-04-09 | 2021-03-11 | Rotor Componentes Tecnologicos, S.L. | Bicycle rear derailleur device |
US20220289337A1 (en) * | 2021-03-15 | 2022-09-15 | Shimano Inc. | Bicycle rear derailleur |
US20230147911A1 (en) * | 2021-11-10 | 2023-05-11 | The Cycle Group | Rear derailleur with one-piece chain cage |
Citations (3)
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GB645791A (en) * | 1948-10-18 | 1950-11-08 | Frederick James William Markle | A foot-controlled derailleur change speed gear for cycles |
US3125894A (en) * | 1964-03-24 | Derailer change-speed for mechanisms for cycles | ||
US3583249A (en) * | 1969-08-21 | 1971-06-08 | Milton Morse | Chain shifting means for derailleur speed changing devices |
-
1985
- 1985-02-15 CA CA000474455A patent/CA1236995A/en not_active Expired
- 1985-02-15 US US06/701,874 patent/US4637808A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US3125894A (en) * | 1964-03-24 | Derailer change-speed for mechanisms for cycles | ||
GB645791A (en) * | 1948-10-18 | 1950-11-08 | Frederick James William Markle | A foot-controlled derailleur change speed gear for cycles |
US3583249A (en) * | 1969-08-21 | 1971-06-08 | Milton Morse | Chain shifting means for derailleur speed changing devices |
Cited By (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4838837A (en) * | 1987-07-02 | 1989-06-13 | Campagnolo S.P.A. | Rear derailleur for bicycle gears |
US4842568A (en) * | 1987-07-24 | 1989-06-27 | Marelmo S.N.C. | Rear derailleur for bicycle gears |
US5013285A (en) * | 1988-10-27 | 1991-05-07 | Carlyle James P | Chain control apparatus |
US5397273A (en) * | 1993-02-03 | 1995-03-14 | Shimano Inc. | Rear derailleur for a bicycle |
US5421786A (en) * | 1993-02-03 | 1995-06-06 | Shimano Inc. | Rear derailleur bracket |
US5466194A (en) * | 1994-06-29 | 1995-11-14 | Bebop Incorporated | Jockey wheel assembly |
CN1073038C (en) * | 1996-07-03 | 2001-10-17 | 弗兰克·萨瓦尔 | Tension and guiding device of chain for bicycle change speed gear |
WO1998001333A1 (en) * | 1996-07-03 | 1998-01-15 | Franck Savard | Tension and guiding device of a chain for bicycle change speed gear |
US6135903A (en) * | 1996-07-03 | 2000-10-24 | Savard; Franck | Tension and guiding device of a chain for bicycle change speed gear |
FR2750668A1 (en) * | 1996-07-03 | 1998-01-09 | Savard Franck | DEVICE FOR TENSIONING AND GUIDING A CHAIN FOR CHANGING BICYCLE SPEEDS |
FR2759968A1 (en) * | 1997-02-26 | 1998-08-28 | Franck Savard | Cycle rear derailleur gear |
WO2000012379A1 (en) * | 1997-02-26 | 2000-03-09 | Shimano Inc. | Rear changer device for bicycle |
US6165089A (en) * | 1998-04-15 | 2000-12-26 | Mcgreal; Timothy R. | Transmission apparatus and method |
US6793598B1 (en) | 1998-08-26 | 2004-09-21 | Shimano Inc. | Rear derailleur device for a bicycle |
US20040106482A1 (en) * | 2002-02-12 | 2004-06-03 | Masashi Nagano | Rear derailleur |
US20040110588A1 (en) * | 2002-07-31 | 2004-06-10 | Shimano, Inc. | Bicycle derailleur with a chain guide disposed at an upper portion of a link mechanism |
US7125354B2 (en) * | 2002-07-31 | 2006-10-24 | Shimano, Inc. | Bicycle derailleur with a chain guide disposed at an upper portion of a link mechanism |
US7104908B2 (en) * | 2002-12-02 | 2006-09-12 | Shimano Inc. | Rear derailleur |
US20050192141A1 (en) * | 2004-02-26 | 2005-09-01 | Shimano Inc. | Bicycle derailleur |
US20050218623A1 (en) * | 2004-02-26 | 2005-10-06 | Shimano Inc. | Bicycle derailleur |
US7318784B2 (en) | 2004-02-26 | 2008-01-15 | Shimano Inc. | Bicycle derailleur |
US7361110B2 (en) * | 2004-02-26 | 2008-04-22 | Shimano Inc. | Bicycle derailleur |
EP1752372B2 (en) † | 2005-07-19 | 2013-02-13 | Shimano Inc. | Bicycle rear derailleur |
WO2007057198A1 (en) * | 2005-11-18 | 2007-05-24 | Angelo Pionna | Rocker for the rear derailleur of a bicycle |
US8277346B2 (en) | 2006-02-28 | 2012-10-02 | Shimano, Inc. | Low profile rear derailleur |
US20070202977A1 (en) * | 2006-02-28 | 2007-08-30 | Shimano Inc. | Low profile rear derailleur |
US20070202978A1 (en) * | 2006-02-28 | 2007-08-30 | Shimano, Inc. | Low profile rear derailleur |
US8012052B2 (en) | 2006-02-28 | 2011-09-06 | Shimano, Inc. | Low profile rear derailleur with cable guide |
US20070207886A1 (en) * | 2006-02-28 | 2007-09-06 | Shimano, Inc. | Low profile rear derailleur with cable guide |
EP2078668A1 (en) | 2006-02-28 | 2009-07-15 | Shimano, Inc. | Low profile rear derailleur |
US7674198B2 (en) * | 2006-09-11 | 2010-03-09 | Shimano Inc. | Bicycle rear derailleur |
EP1897796A3 (en) * | 2006-09-11 | 2008-04-16 | Shimano Inc. | Bicycle rear derailleur |
US20080064545A1 (en) * | 2006-09-11 | 2008-03-13 | Shimano Inc. | Bicycle rear derailleur |
US20080125259A1 (en) * | 2006-09-25 | 2008-05-29 | Shimano Inc. | Bicycle rear derailleur |
US7722488B2 (en) | 2006-09-25 | 2010-05-25 | Shimano Inc. | Bicycle rear derailleur |
US20080081716A1 (en) * | 2006-09-25 | 2008-04-03 | Shimano Inc. | Bicycle rear derailleur |
US20080103000A1 (en) * | 2006-10-24 | 2008-05-01 | Shimano, Inc. | Low profile rear derailleur |
US20080096706A1 (en) * | 2006-10-24 | 2008-04-24 | Shimano, Inc. | Low profile rear derailleur with a chain receiving space |
US8007383B2 (en) | 2006-10-24 | 2011-08-30 | Shimano, Inc. | Low profile rear derailleur |
US8025598B2 (en) | 2006-10-24 | 2011-09-27 | Shimano, Inc. | Low profile rear derailleur with a chain receiving space |
WO2011160307A1 (en) * | 2010-06-25 | 2011-12-29 | Chu Hsin-Kuang | Additional adjustable fully-automatic transmission for bicycle |
US9033833B2 (en) | 2011-01-28 | 2015-05-19 | Paha Designs, Llc | Gear transmission and derailleur system |
US9327792B2 (en) | 2011-01-28 | 2016-05-03 | Paha Designs, Llc | Gear transmission and derailleur system |
US10207772B2 (en) | 2011-01-28 | 2019-02-19 | Paha Designs, Llc | Gear transmission and derailleur system |
US20150031483A1 (en) * | 2013-07-26 | 2015-01-29 | Shimano Inc. | Bicycle derailleur |
US9227696B2 (en) * | 2013-07-26 | 2016-01-05 | Shimano Inc. | Bicycle derailleur |
US9896147B2 (en) * | 2016-02-03 | 2018-02-20 | Quan Pham | Three wheeled velocipede |
RU2654444C1 (en) * | 2017-06-15 | 2018-05-17 | Евгений Павлович Бердюгин | Bicycle transmission |
US20210070396A1 (en) * | 2018-04-09 | 2021-03-11 | Rotor Componentes Tecnologicos, S.L. | Bicycle rear derailleur device |
US11745827B2 (en) * | 2018-04-09 | 2023-09-05 | Rotor Componentes Tecnologicos, S.L. | Bicycle rear derailleur device |
US20220289337A1 (en) * | 2021-03-15 | 2022-09-15 | Shimano Inc. | Bicycle rear derailleur |
US11697473B2 (en) * | 2021-03-15 | 2023-07-11 | Shimano Inc. | Bicycle rear derailleur |
US20230147911A1 (en) * | 2021-11-10 | 2023-05-11 | The Cycle Group | Rear derailleur with one-piece chain cage |
US11884364B2 (en) * | 2021-11-10 | 2024-01-30 | The Cycle Group | Rear derailleur with one-piece chain cage |
Also Published As
Publication number | Publication date |
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CA1236995A (en) | 1988-05-24 |
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